From d3d7a0013f72bdb7466f3020ed2bd17302991ccf Mon Sep 17 00:00:00 2001
From: Katja <katja@localhost>
Date: Wed, 5 Jun 2024 04:12:16 +0200
Subject: [PATCH] Optimized MultilevelAStarEx::generate_path()

---
 src/MultilevelAStarEx.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/MultilevelAStarEx.cpp b/src/MultilevelAStarEx.cpp
index 74fc974..61a267a 100644
--- a/src/MultilevelAStarEx.cpp
+++ b/src/MultilevelAStarEx.cpp
@@ -222,11 +222,19 @@ bool MultilevelAStarEx::can_move(const Node *current, int x, int y) const
 
 TypedArray<Vector2i> MultilevelAStarEx::generate_path(const Node *current) const
 {
-	TypedArray<Vector2i> arr;
+	// count the number of nodes in the path
+	int cnt = 0;
+	for (const Node *n = current; n != nullptr; n = n->parent) cnt++;
 
+	cnt--; // because we're not adding the starting node
+
+	TypedArray<Vector2i> arr;
+	arr.resize(cnt);
+
+	int i = cnt;
 	while (current->parent != nullptr)
 	{
-		arr.insert(0, Vector2i(current->x, current->y) + _trans);
+		arr[--cnt] = Vector2i(current->x, current->y) + _trans;
 		current = current->parent;
 	}